We will solve a quadratic equation by completing the square with 3 different approaches. The first way is the typical way you learn in your algebra class. But the other two might surprise you! Here's a video on how to solve a quadratic equation with irrational coefficients:    • Solving a quadratic equation with irr...  

0:00 Why do we need 3 ways?
0:15 1st way (the classic way)
1:57 2nd way (multiply by 4a first)
2:51 proving the quadratic formula blindfolded
5:18 3rd way
8:42 try this cubic equation:    • solving a cubic equation by completin...  

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